Wheel-rim for pneumatic tires.



G. G. KLEINSGHMIDT. WHEEL RIM FOR PNEUMATIC TIRES.

APPLICATION FILED JUNE 1, 1911.

1,021,783. V Patented Apr.2,1912.

2 SHEETS-SHEET 1.

EFF

[ ar if COLUMIIA Pumucnurli (10-, WASHINGTON. D. c.

G. G. KLEINSOHMIDT.

WHEEL RIM FOR PNEUMATIC TIRES.

APPLICATION I'ILIFD JUNE 1, 1911.

1,021,783. Patented Apr. 2, 1912.

2 SHEETS-SHEET 2.

coumnm puuoown couwmmd'rou. n. c.

1 UNITED STATES PATENT onmcn.

CARL GEORG KLEINSCHMIDT, 0F HEBNE, GERMANY.

WHEEL-RIM PNEUMATIC TIRES.

. separable type and consists, fi'rstly, in using in combination withtwo rim-members placed side by side, a split locking ring which clampsthe edges of the pneumatic tire cover and at the same time engages thetwo rim members, and thereby locks the-m together.

Another part of the invention consists in a device for tightening up andfastening the said locking ring. I

The invention is illustrated in the accompanying drawing, in which-Figure 1 is an elevation of a wheel with the improved rim with portionsof the latter and the tire being cut away; Fig.2 shows the fasteningdevice on a larger scale, partly in section, Fig. 3 is a section on theline A-A of Fig. 2, and Fig. 4 a sectionon the line B-B of the samefigure; Figs. 5 and 6 are respectively a longitudinal section and across-section showing a modification of the fastening device.

Like reference numerals denote like or corresponding parts throughoutthe drawmg.

Inthe drawing, 10 represents a felly made of wood or other material,with a ring 11 thereon, the outer surface of said ring being slightlyconed, to slope away from the median line and form two conical seats forthe symmetrical rim members 12 and 13. The ring 11 and member 12 arepermanently attached to the wooden felly 10 by screws 14. The beads 16ofthe outer tire cover 15 are engaged by the inwardly curved edge portionsof the members 12 and 13.

Surrounding the air tube 17 and intermediate of the edges of the tirecover 15 there is a ring 18 which may be made in one part or severalparts and has lateral flanges 19 bearing upon the inner edges of thecover 15. Said ring 18 also has ribs 20 engaging outer grooves in themembers 12 and 13, so that the latter are locked together by the ring18. To prevent binding,

by rust, the parts 11 and 18 are preferably Specification of LettersPatent.

Application filed June 1, 1911.

Patented Apr. 2, 1912.

Serial No. 630,654.

Delta metal or other alloy, the parts 12 and 13 being of steel.

Instead of a cover with beads 16, as shown, some other known kind ofcover may be used, for example a wired cover.

Instead of having separate parts 12 and 11, the same may be combined asshown in Fig. 6, but this involves'loss of the advan tage of having twosymmetrical members 12 and 13 and of being able to use differentmaterials, as described.

At the place where the locking ring 18 is split the felly 10 has anaperture, forming a chamber 22 wherein two locking members 24 arepivoted upon pins 23, said members 24 having projections 25 which engagewith inwardly directed, hook-like flanges of the ring 18. A radiallyslidable piece 27 in-,

bers 24, so that by inward movement of the piece 27 the outer ends ofthe members 24 are rocked toward each other, like the jaws of a pair ofpincers, and draw together the ends of the ring 18. The slide 27 has ascrew-threaded projection 29, which passes through the floor 30 of thechamber 22, and upon which a wing nut is screwed outside said chamber,an elastic washer 32 being interposed to make a water-tight joint. Thering 18 has a fixed tongue 37 which makes a tight lap joint at the partwhere the ring is split, without interfering with thecontraction of thering.

In the modificationshown in Figs. 5 and 6 the tire valve provided in thefolly 10 is made in one with the fastening device. The stem 33 of thevalve, screwed to the tube 34 leading to the inner air tube, has anenlargement or head 27 for engagement with the projections 28 of thelocking members 24. A bridge piece 37 traversed by the tube 34 is placedover the gap between the ends of the locking ring 18, as a support forthe airtube wall over said gap. The stem 33 is joined to the nipple 3.5,which isprotected by a cap 36.

The arrangement described, which may be modified in detail within thescope ofthe subjoined claims, has important advantages over the rims ofthis class previously designed. The dual function of the locking ring,consisting in fastening the cover and locking the rim members, reducesthe number of parts. The pressure of the inflated tire assists thelocking action and prevents looseness. Renewal of the tire cam beeifected in a simple and expeditious manner. For this purpose the nut 31is unfastened, and the screw 29 thrust out-ward, so that the elasticring 18 can expand sufliciently to withdraw the ribs 20 from engagementwith the members 12 and 13. The member 13 is then removed, with thedamaged tire. The cover of the new tire is first engaged with the member12, and the air tube and ring 18 are placed in position, whereupon themember 13 is pushed on to the ring 11, and the ring 18 is locked. Themember 12, which remains attached, forms a convenient abutment andholder for the heavy, unyielding tire during this operation. The axle isof course jacked up, so that the wheel can revolve. The inflation of thetire compresses the locking ring, so that the fastening device caneasily be tightened up.

The fastening device is very convenient, as the ring 18 can easily beengaged with the members 2 1. The force exerted, for fastening, actsquite uniformly on the two ends of the ring 18.

The device is very compact, and the small chamber required thereforedoes not materially weaken the wheel.

Vith the construction shown in Figs. 5 and G the valve, which must inany case be nnfastened when exchanging the tire' is removed and replacedby the operations which nnfasten and fasten the tire and the rim.

hat I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. A device of the character described, comprisinga pair of rim members having outer grooves, a tire cover engaged by saidmembers, and a locking ring interposed between the edges of said coverand having laterally extending flanges that overlie said cover andinwardly extending ribs that engage the rim-grooves.

2. A device of the character described, comprising a pair of rim membershaving outer grooves, a tire cover engaged by said members, a splitlocking ring interposed be tween the edges of said cover and havingflanges that engage the cover and ribs that engage the rim grooves, andcoupling means for detachably connecting the ends of the locking ring.

3. In a vehicle wheel, the combination of a rim composed of two parallelseparable rim members, with an outer tire cover having its edges engagedwith the said rim members, an inner air tube and a transversely splitlocking ring which is placed between said air tube and rim members andhaving flanges holding the edges of the cover and internal projectionsengaging said rim members, together with pivoted locking members in thefelly, having projections engaging the transverse edges of the lockingring, at the split part and a radial screw device for rocking saidlocking members toward each other.

CARL GEORG KLEINSCHMID'I.

Witnesses ALFRED HENKEL, ALBERT F. NUFER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

